公开(公告)号：US5215614A

公开(公告)日：1993-06-01

申请号：US546019

申请日：1990-06-28

申请人： A. C. J. M. Wijkamp ,  R. Antoni ,  G. Jansman ,  H. W. Wegereef

发明人： A. C. J. M. Wijkamp ,  R. Antoni ,  G. Jansman ,  H. W. Wegereef

IPC分类号： A61M25/00 ,  B29C65/00 ,  B29C65/06 ,  B29C65/78

CPC分类号： B29C65/0672 ,  A61M25/0009 ,  B29C65/7802 ,  B29C66/1142 ,  B29C66/324 ,  B29C66/3242 ,  B29C66/5221 ,  B29C66/5229 ,  B29C66/63 ,  B29C66/73152 ,  B29C66/73921 ,  B29C66/8248 ,  B29C66/8322 ,  B29C2793/0081 ,  B29L2031/7542

摘要： A method of making a catheter is provided. The catheter has an atraumatic portion at the distal end of a catheter having the stiffness and torque resistance required of a catheter such as that suitable for angiographic uses, typically in French sizes on the order of about 2 to about 8. The atraumatic tip portion has a generally co-axially layered structure. An inner layer is made of soft atraumatic polymer, and an outer layer is made of a polymer to impart needed stiffness and torque properties to the catheter. In the preferred embodiment, a portion of the distal tip material of the harder outer layer is removed, thereby exposing the inner, atraumatic material for initial engagement with internal body passageways.